diff --git a/gcc/testsuite/g++.dg/ext/attr-unsequenced-1.C b/gcc/testsuite/g++.dg/ext/attr-unsequenced-1.C
new file mode 100644
index 00000000000..8e640a8cec1
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ext/attr-unsequenced-1.C
@@ -0,0 +1,53 @@
+// { dg-do compile { target c++11 } }
+// { dg-options "-O2 -fdump-tree-optimized" } */
+// { dg-final { scan-tree-dump-times " bar<int> \\\(1, 2, 3\\\);" 1 "optimized" } }
+// { dg-final { scan-tree-dump-times " bar<int> \\\(4, 5, 6\\\);" 1 "optimized" } }
+
+template <typename T, typename U>
+[[gnu::noipa]] U
+foo (T x, T y, T z) [[gnu::unsequenced]]
+{
+  *x = 1;
+  *y = 2;
+  *z = 3;
+}
+
+template <typename T>
+[[gnu::noipa]] T
+bar (T x, T y, T z) [[gnu::unsequenced]]
+{
+  return x + y + z;
+}
+
+int
+baz () [[gnu::unsequenced]]
+{
+  int x, y, z;
+  foo <int *, void> (&x, &y, &z);
+  return x;
+}
+
+int
+qux () [[gnu::unsequenced]]
+{
+  int a = bar (1, 2, 3);
+  int b = bar (1, 2, 3);
+  int c = bar (1, 2, 3);
+  int d = bar (4, 5, 6);
+  int e = bar (4, 5, 6);
+  int f = bar (4, 5, 6);
+  return a + b + c + d + e + f;
+}
+
+template <typename T, typename U>
+[[gnu::noipa]] U
+corge (T x, T y, T z) [[gnu::unsequenced]]	// { dg-warning "'unsequenced' attribute on function type without pointer arguments returning 'void'" }
+{
+  x += y + z;
+}
+
+void
+freddy ()
+{
+  corge <int, void> (1, 2, 3);
+}